Is Your Self Esteem Determining Your Self Esteem?

As an engineer, i am highly respected for knowledge and my expertise in quite a few different realms ofobstructural engineering. But at the same time, every time i want to try and get be as an expert, i have zero confidence about why would people want to listen to me a while win market myself. I think i head graduated from university or college there, my confidence was probly the highest at that point. And the more i learned, i did decrease with confidence. The lowt hof frustration was actually not attempting to do this and working on this because i was afraid failure. Low self esteem can lead to depression, anxiety, substance abuse and other serious problems.